Nancy Cusack had a daughter Elizabeth Wood CUSACK, born Muckleford, Victoria, 12 March 1864. No father's name, but the informant was William WOOD, friend.
24 July 1866, William John Wood was born at Deniliquin NSW, parents, William WOOD & Nancy WOOD, formerly CUSACK.
My problem is that i can't find any info about William & or Nancy after this date. No deaths that look like a match. Nothing!
Elizabeth WOODS married Walter HEAD in Echuca, Vic., 14 Aug 1898. Parents, William WOODS & Nancy QUSICK. Walter, widower, aged 43, usual residence, Moulamain, NSW. Elizabeth, spinster, aged 26. usual residence, Deniliquin, NSW.
As Elizabeth was living in Deniliquin, the family obviously stayed in the area for some time.
The other problem is that i am unable to find anything about the death of Walter's first wife, or a marriage. He immigrated to Aust. when he was about 18. So would have probably married here.